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KB-280
1
Copyright (c) Yamaha Corporation. All rights reserved. PDF
’06.02
SERVICE MANUAL
HAMAMATSU, JAPAN
CONTENTS
SPECIFICATIONS ................................................................. 3
PANEL LAYOUT .................................................................. 4
CIRCUIT BOARD LAYOUT & WIRING ................................ 6
DISASSEMBLY PROCEDURE ............................................. 8
LSI PIN DESCRIPTION ....................................................... 14
IC BLOCK DIAGRAM ......................................................... 16
CIRCUIT BOARDS .............................................................. 17
TEST PROGRAM ............................................................... 26
INITIALIZATION ................................................................. 29
MIDI IMPLEMENTATION CHART ..................................... 30
MIDI DATA FORMAT ......................................................... 31
PARTS LIST
BLOCK DIAGRAM
OVERALL CIRCUIT DIAGRAM
PK
001758
Summary of Contents for PORTATONE KB-280
Page 3: ...KB 280 3 SPECIFICATIONS ...
Page 4: ...4 KB 280 PANEL LAYOUT q w 9 0 1 2 3 4 5 e y r t u i Front Panel A A ...
Page 5: ...KB 280 5 032 116 032 116 6 6 8 9 7 u i 6 7 8 9 0 1 2 3 4 o 0 4 5 6 7 8 1 2 3 Rear Panel A A ...
Page 19: ...19 KB 280 DMLCD Circuit Board Pattern side DMLCD 2NA WG23540 ...
Page 29: ...KB 280 29 INITIALIZATION Clr Frash ...
Page 31: ...KB 280 31 MIDI DATA FORMAT ...